# CVE-2026-56455: HCL DFXAnalytics buffer overflow in memory container

Source: https://junglewise.ai/threats/cve-2026-56455-hcl-dfxanalytics-buffer-overflow-in-memory-container  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-16. Updated: 2026-07-16  
License: CC BY 4.0 with a link back

CVE-2026-56455 · Severity: medium · CVSS 5.3 · Published 2026-07-16

HCL DFXAnalytics, a data analysis platform, is vulnerable to a security flaw that could allow an attacker to crash the system. By sending specially crafted, oversized data to the application, an attacker can cause the service to become unresponsive or shut down entirely. This disrupts business operations and prevents legitimate users from accessing the analytics tools.

Technologies: [HCL Software DFXAnalytics](https://junglewise.ai/threats/technologies/dfxanalytics). Vendors: [HCL Software](https://junglewise.ai/threats/vendors/hcl-software).

## Quick answers

**Is CVE-2026-56455 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-56455 being exploited in the wild.

**How severe is CVE-2026-56455?** Medium severity, with a CVSS score of 5.3, published 16 July 2026.

**Which products and versions are affected?** HCL Software DFXAnalytics 3.0 and below.

**Is there a fix for CVE-2026-56455?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-56455 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-56455?** Check whether you run HCL Software DFXAnalytics at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A stack-based buffer overflow (CWE-121) exists in HCL DFXAnalytics versions 3.0 and below. The vulnerability is caused by insufficient validation of input lengths when processing data, allowing an attacker to overwrite memory containers. This is a network-reachable exploit that requires no authentication or user interaction. Successful exploitation results in a Denial of Service (DoS) condition where the application crashes or becomes unresponsive. Mitigation requires implementing comprehensive input length checks on both the client and server sides.

## Affected products

- HCL Software DFXAnalytics 3.0 and below

## Timeline

- 2026-07-16: advisory: Initial advisory published by HCL Software and NVD

## References

- [https://support.hcl-software.com/csm?id=kb_article&sysparm_article=KB0131787](https://support.hcl-software.com/csm?id=kb_article&sysparm_article=KB0131787)

## Related threats

- [HCL DFMPro and DFX installers privilege escalation via insecure file permissions](https://junglewise.ai/threats/cve-2025-59866-hcl-dfmpro-and-dfx-installers-privilege-escalation-via-insecure)
- [HCL DFXAnalytics internal file path disclosure in dashboard](https://junglewise.ai/threats/cve-2026-56456-hcl-dfxanalytics-internal-file-path-disclosure-in-dashboard)
- [HCL DFXAnalytics use of deprecated TLS 1.0 and 1.1 protocols](https://junglewise.ai/threats/cve-2026-56454-hcl-dfxanalytics-use-of-deprecated-tls-1-0-and-1-1-protocols)
- [HCL DFXAnalytics account takeover via response manipulation](https://junglewise.ai/threats/cve-2026-56453-hcl-dfxanalytics-account-takeover-via-response-manipulation)
- [HCL DFXAnalytics missing HSTS header](https://junglewise.ai/threats/cve-2026-35145-hcl-dfxanalytics-missing-hsts-header)